Hot rolled seamless pipe
G/d of a pipe can operate in a temperature range from -65 to +425°C and, thanks to the thicker wall, at a higher pressure than cold rolled pipe. G/d of the pipe have greater strength, corrosion resistance, wear resistance, and thus meet the most stringent sanitary standards and have an attractive appearance. these pipes are reliable, durable, and the possibility of the secondary use of recycled scrap increases profitability.
Almost the only drawback — the high cost of such pipes.
Material for g/d pipes are steel alloys (GOST: 1050−88; 4543−71; 19 281−89 and 380−88). Assortment defines the GOST 8732−78, technical requirements — GOST 8731−74.Classification g/d pipes
|And||380−88||Steel St2sp, St4sp, St5sp, St6sp with standard strength properties|
|B||380−88, 1050, 4543, 19 281||With the rationing of the chemical. composition of steel|
|In||380−88, 1050, 4543, 19 281||With standard mechanical properties and chemical. composition|
|G||1050, 4543 and 19 281||With the rationing of the chemical. composition and control of the strength of thermally treated samples.|
|D||-||Without rationing strength and chemical. composition, but with the regulation of the allowable hydraulic pressure.|
|The ratio DN/s||Name|
|12,5 — 40||Thin-walled seamless|
|6 — 12,5;||Thick-walled seamless|
|To 6||Particularly thick-walled seamless|
Outer diameter of seamless steel g/d pipes: 45−220 mm. Wall thickness: 3.5 to 25 mm. Thick-walled pipe release heat-treated, they can be welded or seamless.
|Accuracy (outer Ø and wall thickness)||In the form section||Length|
Random: 4 — 12,5 m;
M; length within off-gage
CU — dimensional: within off-gage with an allowance for each cut to 5 mm;
Approximate — within off-gage;
OG — limited.
Example of labeling of tubes with outer diameter of 185 mm, a wall thickness of 3.5 mm, random length, regular accuracy of manufacturing, from steel St2sp, category 1 steel, as, And GOST 8731 of the ingot:
185x3,5 GOST 8732−78
And St2sp GOST 8731−74
Example of labeling of tubes with an outer diameter of 120 mm, a wall thickness of 2.5 mm, length 5000 mm, normal accuracy in thickness and increased in diameter from steel 09G2S:
120п x 2,5x5000 GOST 8732−78
09G2S GOST 30564−98
Pipe 200в5в2000кр — 08KH18N10T GOST 9940−81. It’s a tube with an outer diameter of 200 mm, a wall thickness of 5 mm, high precision manufacturing, the length is a multiple of 2000 mm of steel 08KH18N10T.
Steel pipe with spetsialistami
Made from alloy steel in accordance with (GOST 30 564−98) of steel 10, 20 (GOST 1050−88); 10G2, 30KHMA, 15HM (GOST 4543−7); pipe 09G2S (GOST 19 281−89); 10G2A. Low-alloy structural steel seamless pipe 09G2S most popular today.
The use of pipes
Hot-rolled seamless steel pipe and relevant in the manufacture of welded lanes, designed for significant pressure and temperatures from -70 to +425°C. a Thick-walled tube is popular not only in domestic sanitary and sewer systems, but also used in industrial circuits for the transportation of gas/liquid under high pressure. Good thermal conductivity of such tubes is important in heating systems. Durability, high reliability and reasonable price make them highly profitable for all pipelines.
Supply certified steel pipe at the best prices. The range of normalized GOST 8732−78. In the technical documentation shows the percentage composition and mechanical properties of products. We can easily buy in bulk any semi-finished products for large-scale production. Provide favorable conditions for retail customers. Our company has a high level of service and efficiency of service.
Buy at best price
All pipe products implemented by the company «Electrocentury-steel» comply with GOST and international quality standards. Supply pipe rolling standard and custom sizes in the shortest possible time from warehouses located on the territory of Russia and Ukraine. High quality, affordable prices and a wide range of products define the face of our company. Becoming our regular customer, You will be able to rely on the system of discount discount. Cooperation with us will help You to implement any engineering plans. Waiting for Your orders on the website evek.org.